The Battle of Messines. That was sad and interesting and then sad again with the fiancée who lost her man in this battle. She never married, lived to 100 and was buried with a picture of her fiancé in her hands.
Trench warfare and the design of the trenches to save soldiers from shellfire; a series of rectangular switchbacks, like the top of a castle wall. _|¯¯|__|¯¯|__|¯¯
Secret tunnel warfare in which miners were paid 3x more than the soldiers to dig tunnels under the enemy. The British "undermining" the German mines (packed with explosives) like the game Dig Dug.
Kartoffelstampfer. German stick grenades had handles like batons and were called potato mashers. They had an "idiot's guide" on the handle to indicate how long the fuse would last once lit (5 seconds).
I fell asleep during the nature segment and woke up in battle. Maybe I shouldn't nap with the TV on...
